Date: Sun, 17 Nov 2002 10:25:00 +0000 From: Doug Rabson <dfr@nlsystems.com> To: Marcel Moolenaar <marcel@xcllnt.net>, Daniel Eischen <eischen@pcnet1.pcnet.com> Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/lib/libc_r/arch/ia64 _atomic_lock.S Message-ID: <200211171025.00359.dfr@nlsystems.com> In-Reply-To: <20021116195821.GB1058@dhcp01.pn.xcllnt.net> References: <20021116185125.GB618@dhcp01.pn.xcllnt.net> <Pine.GSO.4.10.10211161411500.14431-100000@pcnet1.pcnet.com> <20021116195821.GB1058@dhcp01.pn.xcllnt.net>
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On Saturday 16 November 2002 7:58 pm, Marcel Moolenaar wrote: > On Sat, Nov 16, 2002 at 02:13:19PM -0500, Daniel Eischen wrote: > > On Sat, 16 Nov 2002, Marcel Moolenaar wrote: > > > If you want me to send patches, let me know. I'm trying to figure > > > out what to do now that the *context functions have been turned > > > into syscalls. It complicates things... > > > > I'm working on converting libc_r to use *context() so don't > > worry about doing it yourself. > > Cool! > > I hope to have the *context syscalls next week. I've decided to > not attack the problem head on, because we don't have time to > fix the infrastructure for it (we need to unwind to recreate the > context). Instead, I hope to hack-up a workable solution from an > ABI breaking change. The ABI breaker allows us to have lightweight > syscalls, which we permanently want. So, doing that now is very > attractive. The intend is to implement the *context syscalls as > lightweight syscalls in a very hackish way. This serves as an > experiment as well as solving an immediate problem. Let's hope > it works out... So you intend to recognise the context calls in the syscall wrapper and special-case them? This would work but it would also work for heavyweight syscalls. I'm still worried about how you are going to flush the user's register stack safely from kernel mode. -- Doug Rabson Mail: dfr@nlsystems.com Phone: +44 20 8348 6160 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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